A complete 2026 guide to Belarus ring sizes: measure the inside diameter of an existing ring or the circumference of a finger, calculate the nearest Belarus size, and compare EU ยท US ยท UK equivalents.
Belarus jewellery sizing commonly uses the inner diameter in millimetres. Measure a ring directly, or convert a finger circumference to diameter by dividing by ฯ.
Print at 100% / Actual Size with page scaling disabled. First verify the 50 mm calibration line with a ruler. Then place a well-fitting ring over a circle and align the ring's inner edgeโnot its outside edge.
Ring Measure in Belarus uses the diameter-based sizing convention commonly explained by Belarusian jewellery retailers: the number on the ring corresponds to its inner diameter in millimetres. This makes the local system straightforward when you own a ring that already fits. Measure the clear internal opening across the centre; a reading close to 17.0 mm points to Belarus size 17, while 17.5 mm points to size 17.5. When only finger circumference is available, divide it by 3.1416 to estimate the diameter.
A Belarus size usually describes diameter, whereas an EU or ISO-style number usually follows inner circumference in millimetres. For example, Belarus size 17 has a diameter of 17 mm and a circumference of approximately 53.4 mm, so its nearest EU/ISO label is around 53. The two systems describe the same physical ring in different ways.
53.4 mm รท 3.1416 โ 17.0
17.0 ร 3.1416 โ 53.4 mm
17 ร ฯ โ 53.4 โ EU 53
1.7 cm ร 10 = 17 mm
Size 17 โ US 6.5โ6.75
Size 17 โ UK N
The calculator rounds to the nearest 0.5 mm Belarus size and provides approximate international equivalents. A jeweller's metal finger gauges remain the best choice for a valuable purchase.
| ๐ง๐พ Belarus Size | ๐ Inner Diameter (mm) | โญ Inner Circumference (mm) | Diameter (cm) | Circumference (cm) | ๐ช๐บ EU / ISO | ๐บ๐ธ US Approx. | ๐ฌ๐ง UK Approx. | Retail Range |
|---|---|---|---|---|---|---|---|---|
| 14 | 14.0 mm | 44.0 mm | 1.40 cm | 4.40 cm | 44 | 3 | F | Extra small |
| 14.5 | 14.5 mm | 45.6 mm | 1.45 cm | 4.56 cm | 46 | 3.5 | H | Extra small |
| 15 | 15.0 mm | 47.1 mm | 1.50 cm | 4.71 cm | 47 | 4.25 | I | Extra small |
| 15.5 | 15.5 mm | 48.7 mm | 1.55 cm | 4.87 cm | 49 | 4.75 | J | Small |
| 16 | 16.0 mm | 50.3 mm | 1.60 cm | 5.03 cm | 50 | 5.5 | Kยฝ | Small |
| 16.5 | 16.5 mm | 51.8 mm | 1.65 cm | 5.18 cm | 52 | 6 | Lยฝ | Common retail range |
| 17 | 17.0 mm | 53.4 mm | 1.70 cm | 5.34 cm | 53 | 6.5 | N | Common retail range |
| 17.5 | 17.5 mm | 55.0 mm | 1.75 cm | 5.50 cm | 55 | 7.25 | O | Common retail range |
| 18 | 18.0 mm | 56.5 mm | 1.80 cm | 5.65 cm | 57 | 7.75 | Pยฝ | Common retail range |
| 18.5 | 18.5 mm | 58.1 mm | 1.85 cm | 5.81 cm | 58 | 8.5 | Qยฝ | Unisex bridge |
| 19 | 19.0 mm | 59.7 mm | 1.90 cm | 5.97 cm | 60 | 9 | Rยฝ | Common retail range |
| 19.5 | 19.5 mm | 61.3 mm | 1.95 cm | 6.13 cm | 61 | 9.75 | Sยฝ | Common retail range |
| 20 | 20.0 mm | 62.8 mm | 2.00 cm | 6.28 cm | 63 | 10.25 | Tยฝ | Common retail range |
| 20.5 | 20.5 mm | 64.4 mm | 2.05 cm | 6.44 cm | 64 | 11 | V | Common retail range |
| 21 | 21.0 mm | 66.0 mm | 2.10 cm | 6.60 cm | 66 | 11.5 | W | Large |
| 21.5 | 21.5 mm | 67.5 mm | 2.15 cm | 6.75 cm | 68 | 12.25 | Xยฝ | Large |
| 22 | 22.0 mm | 69.1 mm | 2.20 cm | 6.91 cm | 69 | 12.75 | Z | Large |
| 22.5 | 22.5 mm | 70.7 mm | 2.25 cm | 7.07 cm | 71 | 13.25 | Z+1 | Large |
| 23 | 23.0 mm | 72.3 mm | 2.30 cm | 7.23 cm | 72 | 14 | Z+3 | Large |
| 23.5 | 23.5 mm | 73.8 mm | 2.35 cm | 7.38 cm | 74 | 14.5 | Z+4 | Large |
| 24 | 24.0 mm | 75.4 mm | 2.40 cm | 7.54 cm | 75 | 15.25 | Z+6 | Large |
The same finger can differ between left and right hands. Decide where the ring will be worn and measure that exact finger. Remove other rings and let the hand return to a normal indoor temperature.
Cut a narrow strip of paper or use a soft tape that does not stretch. Wrap it around the base of the finger so it touches the skin without compressing it. Ensure the loop can pass over the knuckle.
Mark the overlap with a fine pen, lay the strip flat and measure the distance in millimetres. A thick line can shift the result, so read from the starting edge to the centre of the mark.
Divide the circumference by 3.1416. A 53.4 mm circumference gives approximately 17.0 mm diameter, which corresponds to Belarus size 17. Use the calculator above to avoid manual rounding.
Take readings at different times of day. Ignore measurements taken immediately after intense exercise, a hot shower, a very salty meal or exposure to cold outdoor conditions. Select the most consistent reading.
A ring worn on another finger may not give a useful result. Select a round ring that sits comfortably and passes the knuckle with gentle resistance.
Place the ring flat and measure from one inside edge to the opposite inside edge through the centre. Do not include the metal. A digital calliper provides better precision than a ruler.
Turn the ring roughly 90 degrees and repeat. Similar readings indicate the ring is round. Different readings suggest an oval or distorted ring that should be checked professionally.
An inner diameter of 18.0 mm indicates Belarus size 18. A reading of 18.2 mm falls between standard half-size steps, so compare the seller's stock and consider professional fitting before ordering.
Look for values such as 16, 16.5, 17, 17.5 and 18. These normally indicate millimetres of internal diameter. The Russian phrase โัะฐะทะผะตั ะบะพะปััะฐโ is often followed by this number.
EU sizing often follows inner circumference. Multiply a Belarus diameter by ฯ: Belarus 17 gives about 53.4 mm, so compare with EU 53 or the seller's nearest available option.
Use the US approximation in the table, but confirm the listed inner diameter. Belarus 18 is close to US 8, while Belarus 20 is around US 10 to 10.25 depending on the chart.
UK sizes use letters and half letters. Because conversion is not exact, compare the measured diameter and ask the retailer for a millimetre chart when available.
More skin contact can make the same diameter feel tighter.
The size must clear the knuckle yet stay secure at the base.
Cold fingers can temporarily read smaller than their normal size.
Never assume the same finger on both hands uses one size.
Eternity and tension settings can restrict future adjustments.
A rounded interior can fit differently from a flat inner wall.
Use the home calculator as a practical estimate. Visit a jeweller for valuable rings, wide bands, a large knuckle-to-base difference, full-eternity designs, unusual materials or any order that cannot be returned or resized.
These external references are included naturally for technical context, local measuring advice and precious-metal information: